black stingray laying on the bottom, camouflaged in the sand, tropical aquarium pet from brazil

albimaculata animal animals aquaculture aquarium araguaia basin behavior bigtooth black blotched blotches bottom brazil brazilian camouflage camouflaged camouflaging digging dot exotic fish fishes from henlei hiding ichthyology laying leopoldi life marine myliobatiformes pet pets polka polkadot potamotrygon potamotrygonidae ray rays river sand stingray stingrays tocantins tropical white whiteblotched xingu yellow